Hello , I am currently trying to upgrade hive version on our prod clusters form V1.2 to v2.1 We also want to adopt HS2 on the new upgraded cluster. Earlier all queries were submitted via Hive cli.
Would like to understand how large a single HS2 Heap size can be ? And is there any formula to figure out the how many concurrent sessions I can support with this particular heap setting? We currently have a upper limit of supporting 300 concurrent sessions ( hive.server2.thrift.max.worker.threads=300). Based on this we set the max heap size to 70 GB , but seeing many long GC pauses. Would like to understand what is the industry standard for max HS2 Heap size. Are there any recommendations on what JMV GC setting work best for supporting such high number of concurrent sessions? Thanks, Sharanya
